摘要:
To prepare cellulose mouldings, a solution of cellulose in a tertiary amine-oxide is moulded in a hot state and the moulded solution is introduced into a precipitation bath in order to precipitate the contained cellulose, wherein the hot moulded solution is cooled before introduction into the precipitation bath. Cooling occurs immediately after the moulding process and preferably consists of blowing air horizontally on to the cellulose moulding. The process according to the invention allows spinning of the cellulose solution with a high fiber density without the spun fibers sticking together after emerging from the spinneret. In spite of the high fiber density, it furthermore allows the use of a long air gap between the spinneret and the precipitation bath, by which means sufficient time is generated in the spinning process to affect the textile properties of the fibers by drawing at the die (FIG. 1).
摘要:
To prepare cellulose mouldings, a solution of cellulose in a tertiary amine-oxide is moulded in a hot state and the moulded solution is introduced into a precipitation bath in order to precipitate the contained cellulose, wherein the hot moulded solution is cooled before introduction into the precipitation bath. Cooling occurs immediately after the moulding process and preferably consists of blowing air horizontally on to the cellulose moulding. The process according to the invention allows spinning of the cellulose solution with a high fibre density without the spun fibres sticking together after emerging from the spinneret. In spite of the high fibre density, it furthermore allows the use of a long air gap between the spinneret and the precipitation bath, by which means sufficient time is generated in the spinning process to affect the textile properties of the fibres by drawing at the die.
摘要:
Apparatus for the preparation of cellulose fibers from a solution of cellulose in a tertiary amine oxide includes a spinneret having a multiplicity of spinning holes arranged essentially in a ring-shape. An inlet for cooling gas is positioned in the center of the ring-shape arrangement of the spinning holes and immediately downstream of the spinning holes. The inlet comprises a tube having a baffle plate at one end.
摘要:
To prepare cellulose fibres, a solution of cellulose in a tertiary amine-oxide is shaped in hot condition to give filaments, the filaments are cooled and then introduced into a precipitation bath in order to precipitate the dissolved cellulose, whereby the shaped solution is exposed to an essentially laminar gas stream (FIG. 2a) for cooling before introduction into the precipitation bath.
摘要:
Spinning apparatus for carrying out a dry/wet-spinning process includes a spinneret for extruding filaments, a blowing device whereby the extruded filaments may be cooled immediately after being delivered from the spinning holes, a container containing spinning bath liquid, and means for bundling the extruded filaments provided in the spinning bath liquid. Preferably, the same means serves both for bundling and diverting the extruded filaments and is non-rotatable.
摘要:
The invention is concerned with a process for controlling a flowing suspension of shredded cellulose in a liquid, aqueous tertiary amine-oxide and is characterized by the combination of measures that (A) the suspension is introduced into a vessel having an inlet for the suspension, (B) the suspension introduced into the vessel is transported through the vessel and (C) the suspension transported throught the vessel is discharged from the vessel by means of an outlet, (D) the weight of the vessel being measured and the introduction and discharging of the suspension being controlled by means of deviations from a predetermined set value.
摘要:
A device is disclosed to draw off or store viscous mass which is discharged from a process for example as a result of exothermal events. The device contains at least one unit which has one inlet for the viscous mass and one outlet and is at least partly filled with a non combustible liquid inert to the viscous mass. The unit can be in the form of a pipe or a receptacle. Preferably several units in the form of a pipe can be connected one with the other respectively with a unit in the form of a receptacle. The solution discharged can then be transported via the pipes to the receptacle.
摘要:
The invention relates to a system for producing endless molded bodies from a molding compound. For producing the endless molded bodies, spinning means are used comprising an extrusion head through which the molding compound is extruded to form endless molded bodies, a precipitating bath containing a precipitant, and an air gap between the extrusion head and the precipitating bath. After extrusion, the endless molded bodies are first passed through the air gap, and then through the precipitating bath. For facilitating control of the system, it is provided in accordance with the invention that the system comprises a control area arranged in front of the spinning means and accessible by the operating staff, and that the air gap is arranged freely visibly in a height freely defined by a central vision range of an operator standing upright in the staying area and looking substantially in a horizontal direction.
摘要:
The invention relates to a method and a device for treating a fibre mass, such as for example a nonwoven or a woven. Such fibre masses are conveyed through a pressing mill for treatment where they are pressed in at least one pressing zone by means of a press-roll. By the pressing, a treatment fluid already present in the fibre mass is pressed out of the fibre mass. After the pressing out of the treatment fluid, a second treatment fluid is introduced into the fibre mass. In order to achieve a distribution of the second treatment fluid in the pressed fibre mass as quickly and homogenously as possible, according to the invention it is provided that the treatment fluid is introduced through the pressing surface area into the fibre mass in an expansion region, where the pressing power exerted by the press-roll is reduced in the moving direction of the fibre mass. Here, the pressing surface area is the surface through which the pressing power acts on the fibre mass.
摘要:
A device for controlling pressure in a flowing viscous mass includes an inlet, a guiding element having a receiving capacity for the mass flowing from the inlet, a piston movable within the guiding element, and a receptacle which telescopically slides over the inlet when the piston moves.